diff --git a/pkg/fanal/walker/fs.go b/pkg/fanal/walker/fs.go
index 3e7c4db777d9..a70b9528bdbc 100644
--- a/pkg/fanal/walker/fs.go
+++ b/pkg/fanal/walker/fs.go
@@ -37,6 +37,7 @@ func NewFS(skipFiles, skipDirs, onlyDirs []string, parallel int, errCallback Err
 	return FS{
 		walker:      newWalker(skipFiles, skipDirs, onlyDirs),
 		errCallback: errCallback,
+		parallel:    parallel,
 	}
 }